The surface generally is upland and mountainous. Fforest Fawr and Black Mountain extend into the E. of the County and the Cambrian Mountains into the North. The S. coast contains many fishing villages and sandy beaches. The highest point is Carmarthen Fau (2,525 feet). The main rivers are the Tywi, the Lougher (which forms the E. boundary with Glamorgan), and the Gwendraeth Fawr. The principal industries are agriculture, forestry, fishing and tourism.